JP2881290B2 - Lid for easy-open closed container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid for a container for hermetically sealing a soup or the like together with a sap, and more particularly to an easy-open type in which a lid heat-sealed to the container body is peeled off by hand. The present invention relates to a lid of a closed container.

[0002]

2. Description of the Related Art An easy-open sealed container formed by heat-sealing a lid with respect to a container body is capable of sealing a side dish such as a fried dish together with a liquid juice, and stores the side dish without deteriorating the taste of the side dish. Since it can be used, it is widely used in recent years. This kind of easy-open sealed container needs to have a sufficient sealing property with respect to the container body in order to prevent the juice from leaking, as well as the soup and the like stored in it. Conversely, when taking out the contents such as the soup, the lid must be easily peeled off from the container body.

For this reason, for example, Japanese Patent Application Laid-Open No.
Patent Literature 2, such as a "sealed container", a "closed container obtained by heat welding a container body having a flanged opening and a lid material on the flange, the flange in a wide range of sealing conditions For the purpose of providing a hermetically sealed container which is securely hermetically sealed to the end and does not have the adverse effect of sealing failure due to uneven thickness of the flange of the container main body or variation in the temperature of the seal bar, `` a container main body having an opening with a flange, In a sealed container made of a lid material that is heat-welded annularly to the container body on the flange, the lid material extends at least in a substantially radial direction around the center of the lid material on an external surface located on the heat-welded portion. Having at least one recess,
In which two concave portions are formed by hot pressing at the time of thermal welding between the container body and the lid member ".

According to this conventional "sealed container", "the heat-sealed end of the container body and the lid member are sealed under a wide sealing condition without being affected by uneven thickness of the flange of the container body or variation in the temperature of the seal bar. It is possible to obtain a hermetically sealed container excellent in hermeticity, which can be heat-welded to a portion of the container, and an easily-openable hermetically sealed container which is opened by utilizing delamination of the container body from the outer end of the container. Since the lid material and the surface layer of the container body are reliably thermally welded to the outer edge of the container under the concave portion on the surface of the lid material, delamination can be easily started, and easy opening due to poor sealing can be achieved. Is not impaired.
Even when a plastic molded lid is used as the lid material, a sealed container having a sufficient hermeticity without being affected by unevenness of the molded lid, contaminants such as overflowing contents, and excellent openability. It is possible to obtain an easily-openable closed container having the same, but it has the following problems that still need to be solved.

[0005] Although a tab for peeling off the lid from the container body is provided, the sealing of the lid with respect to the container body is so good that the lid cannot be easily peeled off with this tab. In the case where the stored thing is a piece of sap, such as a soup, as shown in FIG. 4, the sap must be cut once and the contents taken out. It is difficult to form a cut because the hermeticity is too good. Since the lid that covered the water cut end is returned due to its own flexibility, it is closed again, so that the draining operation cannot be easily performed. This type of container has a container body and a lid that are stacked on top of each other before storing items, but it is difficult to remove each one unless they do not completely overlap each other. Becomes In order to seal the lid material (lid) to the container body containing the stored items, the lid must be completely fitted to the container body and must not be allowed to float from now on, so that the liquid juice will leak during transportation. I will come out.

When the lid is sealed to the container body, an adhesive is used, and the adhesive is softened by applying heat or pressure to enhance the adhesive effect. Therefore, the adhesive strength is easily affected by sealing conditions such as environmental conditions, pressure, time and the like at the time of hot-melt of the adhesive, adhesion of contents on the sealing surface, and the like, and is likely to vary. If this variation is biased toward the weaker sealing property, the problem of sealing leakage increases, so in general bonding work, the sealing temperature and pressure are set higher to bias the sealing property toward the higher one. .

[0007] In this case, the lid is strongly adhered to the container body, and the openability is sacrificed, so that an easy open container cannot be obtained.

The inventors of the present invention have repeatedly studied how to solve the above-mentioned problems in this kind of easy-open sealed container, and as a result, completed the present invention. It is.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned situation in such an easy-open closed container, and the problem to be solved is to solve the problem while storing articles. An object of the present invention is to maintain a sufficient hermeticity (sealability) and to easily peel off the lid and maintain the shape of the drain.

That is, the object of the present invention is to
While the storage items are being stored, the sealing performance and sealing performance of the lid body with respect to the container body can be made sufficient, and the lid when a part of the lid body is peeled off to form a drainage opening is formed. It is an object of the present invention to provide an easy-open closed container that can easily perform a draining operation while maintaining the shape of the body, and can easily peel off the lid.

[0011]

In order to solve the above-mentioned problems, the means adopted by the present invention will be described with reference to the reference numerals used in the embodiments. The lid 10 is sealed by a seal flange 12 on a flange upper surface 21 of a container main body 20 constituting the open sealed container 100, and a lid main body 11 inside the seal flange 12 is depressed in the container main body 20, At least one corner portion of the lid body 10 has a bulging engagement portion 13 that engages with the bulging engagement portion 22 on the container body 20 side.
An inclined surface 14 surrounding the bulging engagement portion 13 and reaching the lid main body portion 11; a vertical wall 15 positioned on both sides of the inclined surface 14 and fitted into the upper end opening of the container main body 20; To form
In addition, the lid 10 for the easy-open sealed container 100 is integrally formed with a knob tongue piece 18 projecting substantially horizontally from the seal flange 12 at the corner.

[0012]

The operation of the lid 10 according to the present invention constructed as described above will be described together with its mode of use. First, the lid 10 has a lid body 11 having a flat surface. In contrast, the seal flange 12 and the tongue tongue piece 18 are provided via the inclined surface 14, the vertical wall 15, and the auxiliary inclined surface 16.
Are formed integrally with each other, so that they can be easily manufactured using a synthetic resin sheet, and are sufficient to seal the inside of the container body 20 in which this is fitted and sealed. It is something that has become.

Before the lid 10 is fitted to the container main body 20, a large number of the same ones are piled up, taken out one by one, and fitted to each container main body 20. However, at the time of the overlapping, they do not strongly overlap each other (blocking). This is because at least one corner of the lid 10 has a bulging engagement portion 13 slightly bulging outward from the vertical wall 15. Since the lids 10 abut on the seal flange 12 or the inclined surface 14 of the other lids 10, the lids 10 do not strongly overlap. Therefore, it is possible to reliably take out one by one the many lids 10 that are stacked.

When the lid 10 is fitted to a container body 20 containing a container such as a soup containing liquid juice, for example, while these are transported toward a heat sealing machine, the liquid juice in the container body 20 is removed. No spills. This is because the lid body 10 is fitted with the lid body part 11 depressed into the container body 20 and the vertical walls 15
Abuts against the inner surface of the wall forming the upper end opening of the container body 20, and the bulging engagement portion 13 on the lid 10 side is
This is because it is engaged in the bulging engagement portion 22 on the 0 side. Therefore, the sealing flange 12 of the lid 10 is
Even when the lid 21 is not yet sealed to the flange 21 on the 0 side, the lid 10 does not rise from the container main body 20 and maintains a substantially complete hermetic state.
The sap inside 0 does not leak out. Also,
Since the seal flange 12 of the lid 10 is almost completely abutted on the flange 21 of the container body 20, the loading and sealing work on the heat sealing machine can be performed reliably. is there.

In the embodiment described below, a sealing layer having a thickness of about 1 to 8 microns is formed on the entire lower surface of the sealing flange 12 of each lid 10, and a heat sealing machine is used to form the sealing layer on the lid 10 side. By heating and crimping the seal flange 12 and the flange 21 on the container body 20 side,
Each lid 10 is heat-sealed to the container body 20 over the entire surface of the seal flange 12, and the container body 2
The inside of 0 is completely sealed.

Now, in order to take out the stored contents in the above-described easy-open sealed container 100, first, as shown in FIG. 4, the excess liquid must be discarded. , A part of the lid 10 must be peeled off from the container body 20. The operation in this case can be easily performed by the presence of the knob tongue piece 18, and can also be easily performed for the following reasons. In other words, if the above-mentioned vertical wall 15 is located at the portion where the knob tongue piece 18 is located, the vertical wall 15 cannot be peeled off without applying a force that breaks the shape of the vertical wall 15. Lid 1
In FIG. 0, an inclined surface 14 surrounding the above-mentioned bulging engagement portion 13 is formed at the corner portion, and the seal flange 12 and the lid main body 11 are smoothly continuous by the inclined surface 14. This is because there is no need to break down the wall 15.

The fact that the vertical wall 15 does not need to be broken means that a small force is required when the lid 10 is peeled off by the knob tongue piece 18, but the sealing strength of the sealing layer is slightly increased accordingly. You can set it. That is, in the lid 10 of the easy-open container 100, the sealing strength with respect to the container main body 20 can be set slightly higher, so that leakage of the liquid juice at the time of sealing can be reliably prevented.

As described above, at one corner of the easy-open closed container 100,
A drain 19 as shown by the imaginary line in FIG. 1 is formed.
8 is maintained even when the finger is released. This is because the end of the above-described inclined surface 14 is located on the side of the lid 10 located on both sides of the drainage opening 19, and the end of the inclined surface 14 is directly used as the lid main body 11 and the vertical wall 15. Is continuous
When the tongue piece 18 is pulled up to form the drain opening 19 in the easy-open sealed container 100, the inclined surface 14 and its end are slightly deformed without returning to the original state. This is because the open state of the drain opening 19 is maintained. That is, when the drain opening 19 is formed, the lid 10 covering this portion
And the knob tongue piece 18 integral therewith maintain the open state as shown in FIG.

As described above, maintaining the state in which the drain port 19 is kept open is quite important in the easy-open closed container 100 that also stores this kind of juice. . The reason for this is that if the hand is released from the knob tongue piece 18, the drain port 19
This is because if it is covered again by a part of zero, it becomes difficult to release only the juice. In addition, when the entire lid 10 is to be peeled off in order to take out the stored items, the peeling portion including the knob tongue piece 18 is used as a trigger, but the knob tongue piece 18 is relatively small. This is because if it is difficult to search, it is difficult to grasp the trigger. This is especially important for older people with poor vision.

The water drain 19 as described above is formed by peeling off the lid 10 with the tongue piece 18, and it is difficult to determine how much force should be applied. In the lid 10, the necessary drainage opening 19 can be formed almost without hesitation. This is because the lid 10 at the portion where the inclined surface 14 is formed is peeled off from the container body 20. The peeling can be performed with a small force by the above-described action of the inclined surface 14, while the vertical wall is removed. When it is peeled off to 15 places, a little strong force must be applied, so that boundary becomes the boundary that forms the drain 19,
This is because it can be understood by the worker as a real feeling.

As described above, when the draining of the container body 20 is completed, it is not necessary to worry about leakage of the juice, so that the lid 10 can be peeled off with a little force. is there. In this case, in the lid 10 of the present embodiment, the auxiliary inclined surface 16 having an area smaller than the above-described inclined surface 14 is formed at each part of each side. Easy peeling.
That is, each of the auxiliary inclined surfaces 16 performs substantially the same operation as the inclined surface 14 when the lid 10 is peeled off.

In the following embodiment, the inclined surface 14 is formed only at one corner, but the inclined surface 14 may be formed at another corner. For example, since the above-mentioned action does not occur even at the corner portion, it goes without saying that draining and peeling of the lid 10 from the container main body 20 can be more easily performed.

[0023]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a lid according to the present invention; FIG. The lid 10 is made of a synthetic resin sheet as a material, for example, by air pressure molding. The lid body 11 is fitted into the upper opening of the container body 20 as shown in FIG. The entirety of the seal flange 12 formed as described above can be placed on the flange 21 on the container body 20 side.

The easy-open sealed container 10
0 is not limited to the case where the plane shape is a substantially square shape as shown in FIG. 1, and it goes without saying that the shape can be implemented not only as a rectangle but also as a triangle or another polygonal shape. . In this embodiment, each lid 1
0, a seal layer having a thickness of about 1 to 8 microns is formed on the entire lower surface of the seal flange 12, and the presence of this seal layer causes the seal flange 12 on the lid 10 side and the flange 21 on the container body 20 side. By heating and press-fitting with a heat sealing machine, each lid 10 is heat-sealed to the container main body 20 over the entire surface of the seal flange 12, and the inside of the container main body 20 is completely sealed.

In the present embodiment, a gravure coat printing method is employed for forming the seal layer, whereby the thickness of the seal layer at the corner portion is made smaller than that of the other portions, and the thickness of the portion is reduced. The peeling is made easy. The material forming the seal layer is a hot melt type material, which is mainly composed of a synthetic rubber such as a styrene-butadiene rubber and a chloroprene rubber.

In the lid 10 of this embodiment, as shown by a dotted line in FIG. 1, each bulge formed on the container body 20 side projects slightly outward from a vertical wall 15 described later. A bulging engagement portion 13 that engages within the extension engagement portion 22 is formed. An inclined surface 14 is formed around the bulging engagement portion 13 located at the lower left portion of FIG. is there. Connecting surfaces 14a are provided at both ends of the inclined surface 14.
Are located continuously, and both ends of the inclined surface 14 are connected to the vertical wall 15 by the connecting surface 14a.

In the lid 10 of this embodiment, auxiliary slopes 16 each having a smaller area than the above-described slope 14 are formed on each side. It is designed to be easily peeled off.
That is, each of the auxiliary inclined surfaces 16 has substantially the same function as the inclined surface 14 when the lid 10 is peeled off, and the vertical wall 15 is provided between the auxiliary inclined surfaces 16 and the inclined surfaces 14. It is formed.

Each vertical wall 15 is to be fitted into the upper opening of the container body 20, and the outer surface thereof is in contact with the inner surface of the wall on the container body 20 side.
Literally as a vertical plane. If the container body 20
When the upper opening on the side is widened upward, it goes without saying that each of the vertical walls 15 also has a surface corresponding to its inclination. In short, each vertical wall 15 is formed so as to be able to come into contact with the wall surface on the container body 20 side, so that the fitting of the lid body 10 to the container body 20 is ensured, and the intrusion of liquid juice is prevented. Things.

In addition, as shown in FIG. 1 and the like, a knob tongue piece 18 is integrally formed with the portion of the lid body 10 where the inclined surface 14 is formed. Is, as shown in FIG.
, And are formed as they protrude in the lateral direction. Of course, if the inclined surface 14 is also formed at another corner portion, the knob tongue piece 18 is also formed at that portion.

In the lid 10 according to the present embodiment, as shown in FIG. 1, a mounting surface which forms the same surface as the lid main body 11 at the other corner of the corner where the inclined surface 14 is formed. A step 17 is formed, and the mounting step 17 also prevents blocking when the easy-open sealed containers 100 are stacked.

[0031]

As described in detail above, in the present invention,
As exemplified in the above embodiment, “the seal upper surface 21 is sealed on the flange upper surface 21 of the container main body 20 constituting the substantially square easy-open closed container 100 that prevents liquid leakage. The cover body 11 is a cover body 10 that is depressed in the container body 20, and the bulge that engages with the bulge engagement portion 22 of the container body 20 at at least one corner of the cover body 10. The engaging portion 13, an inclined surface 14 surrounding the bulging engaging portion 13 and reaching the lid main body 11, and fitted on the upper end opening of the container main body 20 located on both sides of the inclined surface 14. The vertical wall 15 is formed, and the knob tongue piece 18 projecting substantially horizontally from the seal flange 12 is integrally formed at the corner portion. " While storing, the lid The sealing workability and the sealing performance with respect to the container body can be made sufficient, and the drainage operation is facilitated by ensuring that the shape of the lid is maintained when a part of the lid is peeled off to form a drain port Can be done to
Moreover, it is possible to provide an easy-open sealed container that can easily peel off the lid.

That is, according to the lid 10 of the present invention, the following effects can be exhibited. Since at least one of the corners is formed with an inclined surface 14 extending to the lid main body 11 surrounding the bulging engagement portion 13, the lid 10 can be easily peeled off by the knob tongue piece 18. Can be. Forming the drainage opening 19 for draining the juice can be easily performed by the above-described effect. Since the lid 10 that covers the drain port 19 does not return due to its own flexibility, the drain port can be easily drained. Since the lid 10 is formed with the bulging engagement portion 13 that engages with the bulging engagement portion 22 on the container body 20 side, at least at one corner thereof, the lids 10 completely overlap each other. The lid 10 can be easily taken out one by one. When the lid 10 is sealed to the container body 20 containing the stored items, the cover 10 is formed with the vertical wall 15 fitted into the upper end opening of the container body 20.
Thereby, the lid 10 can be completely fitted to the container main body 20 so as not to float therefrom, and the liquid juice does not leak out during the transportation. In addition, since the lid 10 of the present invention facilitates peeling from the container main body 20 by the inclined surface 14, the sealing strength with respect to the container main body 20 can be relatively high, and as a result, Thus, leakage of the liquid juice stored in the container body 20 can be completely prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of a lid according to the present invention.

FIG. 2 is a partial perspective view of the same.

FIG. 3 is a partial front view showing a state before the lid according to the present invention is fitted to the container body.

FIG. 4 is a partial perspective view showing a state in which a part of the lid of the present invention is peeled off with a tongue to form a drain, and the drain is used to drain the water.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Easy open airtight container 10 Lid 11 Lid main body 12 Seal flange 13 Swelling engagement part 14 Inclined surface 14a connecting surface 15 Vertical wall 16 Auxiliary inclined surface 17 Mounting step 18 Knob tongue piece 19 Drain 20 Container body 21 Flange 22 bulging engagement part

Claims (1)

(57) [Claims] 1. A substantially rectangular easy-open sealed container that prevents liquid leakage, which is sealed on a top surface of a flange of a container body by a seal flange, and a lid body portion inside the seal flange is provided in the container body. A cover body that is depressed, wherein at least one corner of the cover body has a swelling engagement portion that engages with the swelling engagement member on the container body side; An inclined surface reaching the lid body portion, and a vertical wall positioned on both sides of the inclined surface and fitted into the upper end opening of the container body, and substantially horizontally from the seal flange at the corner portion. A lid for an easy-open closed container integrally formed with a protruding knob tongue.